Rule:
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Sid:
1133
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Summary:
This event is generated when the Cybercop vulnerability scanner is used
against a host.
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Impact:
Cybercop can be used to identify vulnerabilities on host systems.
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Detailed Information:
This particular packet is a part of Cybercop's OS identification.
Specially crafted packets are able to elicit different responses from
different operating systems. This packet is likely to be part of a full
Cybercop scan rather than an isolated event.
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Affected Systems:
All
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Attack Scenarios:
Cybercop can be used by attackers to determine vulnerabilities present
on a host or network of hosts that could be used as attack vectors.
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Ease of Attack:
Simple
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False Positives:
This tool can be used legitimately by system and network administrators.
Other vulnerability scanners may display the same behavior.
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False Negatives:
None known.
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Corrective Action:
TCP packets with SYN, FIN and PUSH set at the same time are abnormal,
use a packet filtering firewall to block them.
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Contributors:
Sourcefire Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>
Snort documentation contributed by Steven Alexander<alexander.s@mccd.edu>
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Additional References:
Arachnids:
http://www.whitehats.com/info/IDS145
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